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Algebra Difficulty 1.0 Junior Find the answer Canada

In a class of 25 students, each student has at most one pet. Three-fifths of the students have cats, 20% have dogs, three have elephants, and the other students have no pets. How many students have no pets?

(A) $5$ (B) $4$ (C) $3$ (D) $2$ (E) $1$

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.